Hi Pam...WAIT!! You have a leg up on your H!!! If he is worried about you seein someone start being really mysterious about your whereabouts and vague about where you are/were!! And then when he gets really frustrated about it...tell him that you are living the 'single life'.
I think that it is cheating until you get the decree of D. The wayward spouse is just telling you that it is not cheating so that they feel better about doing it.
I recommend getting a book by Dr. James Dobson called 'Love Must Be Tough'. Very good book that can give you strength in the rough times of infidelity.